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Owner`s Manual

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Brushcutters OWNER’S MANUAL IMPORTANT: Keep these instructions and the engine booklet in a safe place for future reference. They contain important information about your brushcutter. 554282 - Masport Brushcutter OM - July 2010 Part No: 554282 This manual covers the models: MT23HM/B, MT23HM, MT27M, MT27K, MT27H, MT36K & MT36H. Some features mentioned may not apply to your brushcutter. About this Manual Thank you for purchasing this product. This instruction manual describes operating procedures and precautions as well as inspection and maintenance procedures for the machine. Before using this device, read this manual carefully until you are familiar with the contents. Carefully observe all warnings and safety instructions to ensure correct operation of the machine. Doing so will ensure safe operation and optimum performance of the device. This manual contains information applicable to several models of the machine. Before reading this manual, identify the model of the machine and the engine mounted on it. Also refer to the separate instruction manual for your engine. Be sure to strictly observe the important safety information that follows each bulleted term below. Failure to follow the instructions for correct operation contained herein can result in a severe accident. ・DANGER: Indicates that failure to follow the instructions creates an imminent hazard leading to death possible or severe injury. orseveredeath injury. ・WARNING: Indicates that failure to follow the instructions has the potential to result in death or severe injury. ・CAUTION: Indicates that failure to follow the instructions can lead to minor injury or severe damage to the machine. NOTICE This is an auxiliary explanation that provides useful information and instructions. forplace easyand reference. in a safe handy for easy reference. z After studying this manual, keep it handy If this manual is lost or damaged, immediately order a new copy from your dealer. z z If lending or transferring the machine to a third party, be sure to include this instruction manual and to instruct the z z third party to read the manual carefully before operating the device. Product specifications are subject to change without notice in the interests of improved product quality or performance or to enhance product safety. The descriptions and illustrations contained in this manual may mightdiffer differ somewhat from the machine. If you find any part of this manual to be unclear or confusing, contact your dealer. Contents Technical Data. ........................................................... 3 Meanings of pictographs ................................................... 4 [1] Names of Parts ･･･････････････････････････････････････････････････････････ 51 2 [2] Safety Instructions ････････････････････････････････････････････････････････ 6-8 9 [3] Ensuring Safe Operation ･･････････････････････････････････････････････････ 5 7 [4] Fuel and Oil･･････････････････････････････････････････････････････････････ 11 8 [5] Assembly ････････････････････････････････････････････････････････････････ 12 8 [5-1] Mounting the cutting attachment guard･････････････････････････････････ 12 9 [5-2] Mounting the cutting blade or nylon trimmer ･･･････････････････････････ 13 11 [5-3] Attaching the handle, throttle linkage, and cord ･････････････････････････ 15 12 [6] Starting and Stopping the Engine ･･･････････････････････････････････････････ 16 16 [7] Wearing the Harness ･･････････････････････････････････････････････････････ 20 18 [8] Inspection and Maintenance････････････････････････････････････････････････ 22 22 [9] Long-term Storage ････････････････････････････････････････････････････････ 26 23 [10] Troubleshooting ･････････････････････････････････････････････････････････ 27 2 554282 - Masport Brushcutter OM - July 2010 3 3 554282 - Masport Brushcutter OM - July 2010 dB dB Racing (LPR) 3) 2) 1) 3) L) Equivalent vibration total values Racing (R L) Reference for the harmonized standard ISO 7917 Reference for the harmonized standard ISO 10884 Reference for the harmonized standard ISO 22867 Vibration levels Idling (R L) min-1 (R 3800 min-1 Recommended engine idling speed Engine speed at beginning of clutch engagement Idling (LPI) Idling (LWI) Sound power Racing (LWR ) levels 2) Guaranteed sound power level (LWA) Sound pressure levels 1) 2800 min-1 Output shaft speed 2 2 m/s m/s 5.7 7.8 2.3 5.5 6.3 4.6 113 2 dB m/s 84 111 dB dB 100 77 5900 8000 min-1 8000 min Recommended maximum engine speed -1 0.74 22.2 485 225 1480 Engine speed at maximum power kW mm Height Maximum shaft brake power,measured in accordance with ISO 8893 mm Width 3 mm Length cm Rotational speeds 3 , 4 or 8 1.4 0.5 7.6 10.1 3.6 7.5 7.4 7.7 109 107 84 96 77 3800 2800 5900 8000 8000 0.74 22.2 210 230 5.2 6.1 4.2 5.6 7.6 2.3 106 104 81 95 73 3800 2800 5900 8000 7500 1.03 25.6 280 395 1.36 0.58 3.0 6.9 6.5 5.9 MT27H GX25T 4.6 6.2 2.2 9.2 12.2 4.4 107 106 87 96 76 3800 2800 5900 8000 7500 0.77 26.3 290 395 1835 5.4 7.5 1.8 5.7 7.7 2.4 107 106 83 94 73 3800 2800 5900 8000 7000 0.72 25.0 305 395 1875 Seen from above anti clockwise 25.4 1835 230 0.6 6.4 6.0 5.4 MT27K TJ27E 8000 1740 0.4 6.3 5.8 5.5 MT27M TU26PFD Loop handle -1 min Engine displacement External dimensions 2.4 Seen from above clockwise 0.4 4.7 4.4 4.0 MT23HM HM23K-10 mm mm mm Specified blade thickness Specified blade diameter Number of cutting teeth Center hole diameter Rotational speed at maximum allowed engine speed Rotational direction of output shaft Gear ratio Cutting attachment Blade l mm Volume 4.4 4.7 kg 3.9 MT23HM/B HM23K-10B kg kg Nylon line diameter Fuel tank Masses Nylon trimmer Unit without cutting attachment, empty tank Unit with specified cutting attachment, empty tank Unit with specified cutting attachment, full tank Model Engine Handle type Technical Data 4.4 5.6 2.7 4.5 5.0 4.0 111 110 87 99 77 3800 2800 5900 8000 7000 1.03 34.4 520 690 1850 0.7 8.7 8.2 7.5 MT36K TJ35E 255 Double handle 4.1 5.6 1.7 4.0 4.8 3.0 110 109 86 96 73 3800 2800 5900 8000 7000 1.0 35.8 520 690 1875 0.63 9.4 8.9 8.4 MT36H GX35T Meanings of pictographs DANGER - WARNING - CAUTION Never attempt to mount a saw blade on this brushcutter. Do not operate the device within 15 meters of a child, animal, or bystander. Wear safety gear. 1. Face shield or protective goggles 2. Head protection 3. Ear protection 4. Heavy-duty gloves 5. Non-slip safety shoes Before using this device, read this manual carefully until you are familiar with the contents. Do not refuel or operate the machine near open flame. Watch out for objects thrown from the brushcutter. Do not run the engine in a room or in any confined area where exhaust emissions can accumulate. Never touch the spark plug cap or high-voltage wire while the device is running. Do not touch metal parts that can become very hot during and immediately after device operation. 4 554282 - Masport Brushcutter OM - July 2010 4 1 5 11 12 [1] Names Parts [1] Names of of Parts 13 13 13 11 12 18 9 14 15 22 14 9 16 MT23HM/B 2218 18 7 8 13 17 MT23HM 17 21 MT23HMB MT23HM MT23HMB MT27M MT23HM MT27M MT27K MT27K MT27H 12 11 MT27M 17 MT27K MT27H MT36K 17 MT36K MT36H MT36H 8 3 2 1 43 5 8 11 9 8 9 8 10 2 12 9 8 15 5 1 1 2 3 2 3 6 10 14 1516 7 12 1 5 12 11 14 9 8 15 16 3 4 1 5 2 13 6 7 11 10 58 7 42 12 3 9 6 5 11 10 11 4 8 7 12 10 6 9 15 14 MT27K MT27H 17 2 1 7 12 13 14 3 6 11 10 4 13 14 MT27M 16MT27K MT27H MT27M 7 9 10 6 9 16 1 10 6 5 8 11 913 16 15 17 21 12 2 4 5 15 14 15 MT23HM 21 5 2 3 3 6 104 11 4 14 16 MT23HM MT23HM/B 18 16 12 7 8 1 2 71 13 15 MT23HM/B 15 18 1 5 13 14 3 4 68 10 96 11 12 10 22 18 10 6 5 14 2 7 6 24 4 3 7 4 14 7 15 16MT36K MT36H MT36K MT36H 15 18 18 MT27H 19 19 20 20 MT23HMB MT36K MT23HM MT36K MT36H 1. Engine Suspension MT27M 1. Engine 12.12. Suspension pointpoint MT36H 2. Spark plug 13. Loop handle 13. Loop handle MT27K 2. Spark plug 3. Air3.cleaner cover 14. Shaft Air cleaner cover 14. Shaft tubetube MT27H 18 19 20 4. Fuel 15.15. Cutting attachment guardguard 4. Fuel tanktank capcap Cutting attachment 5. Muffler 16.16. Angle transmission 5. Muffler Angle transmission 6. Throttle linkage 17. Blade 6. Throttle linkage 17. Blade 7. Clutch case 18.12. Nylon trimmer point 1. Suspension 7. Engine Clutch case 18. Nylon trimmer 8. Control handle 19. Skirt 2. Control Spark plug 13. Skirt Loop handle 8. handle 19. Throttle cover trigger 20.14. Blade cover 3. Throttle Air9.cleaner Shaft tube 9. trigger 20. Blade cover 10. Throttle trigger lockout 21. Harness 4. Fuel tank cap 15. Cutting attachment guard 10. Throttle Harness 11. Stop trigger switch lockout 22.21. Shaft case 5. Muffler 16. Angle transmission 11. Stop switch 22. Shaft case 6. Throttle linkage 17. Blade 7. Clutch case 18. Nylon trimmer 8. Control handle 19. Skirt Disposal of9. Packaging Throttle trigger 20. Blade cover 10. Throttle trigger lockout 21. Harness Remove all protective packaging. Make sure you properly dispose of, or recycle the Shaft packaging 11. Stop switch 22. case materials where possible. Comply with the applicable waste disposal laws in your area.- 1 - -15 -1554282 - Masport Brushcutter OM - July 2010 6. Operator Safety [2] Safety Instructions WARNING Do not operate this device if you… • cannot concentrate due to fatigue, illness, or injury; • are under the influence of drugs or alcohol; • are under the age of 15; • are pregnant. If any of the above applies, a possible lack of judgment can result in an accident. 1. About This Manual CAUTION Fig.2-1 7. Monitor the weather WARNING This manual contains important safety instructions. Before using this device, read this manual carefully until you are familiar with the contents. Carefully observe all warnings and safety instructions to ensure correct operation of the machine. Doing so will ensure safe operation and optimum performance of the device. CAUTION This instruction manual does not cover all possible situations and conditions. Although we have taken all possible steps to ensure the safety of this device, the operator and the person performing maintenance of the device must also take all possible steps to ensure safety. 2. Recommended Uses CAUTION Use this brushcutter only to cut weeds or brush below your knee height. Do not use it for delimbing, bucking or felling of trees. Fig.2-3 Do not operate the machine under any of the following circumstances: • When the ground is slippery or you cannot maintain a stable posture for any reason. • At night, in heavy fog, or at any other times where your field of vision is limited and it is difficult to gain a clear view of the working area. • During rainstorms, thunderstorms, in strong or galeforce winds, or in any other adverse weather in which use of this device would be unsafe. 8. Using Safety Gear WARNING 3. Safe Practices CAUTION Follow local noise regulations regarding the acceptable times and locations for using this device. Also observe current local safety regulations, standards, and ordinances. 4. Replacement Parts WARNING To maintain optimal safety and performance, use only the manufacturer’s genuine parts and accessories. Do not modify the device or use it for purposes other than those specified. Failure to observe this requirement can result in severe accidents and damage to the device. 5. Never use a saw blade CAUTION Fig.2-2 Never attempt to mount a saw blade on this brushcutter; it is not designed to use a saw blade. The cutting attachment guard for this device does not meet the safety standard for a saw blade; therefore, thrown objects can cause injury. 6 554282 - Masport Brushcutter OM - July 2010 -2- Fig.2-4 Always wear proper clothing when using this device. • Tight-fitting, safe, and non-restricting clothing including a long-sleeved shirt and a pair of trousers. (Avoid wearing shorts or baggy clothing.) Loose-fitting clothing can become entangled in a tree branch or the like, posing the risk of tripping and resultant injury. • Ear protection to protect your hearing • Face shield or protective goggles • Heavy-duty gloves • Non-slip safety shoes (Never operate this device while barefoot or when wearing sandals.) • Head protection to protect your head from thrown objects, etc. 9. Basic Operations 13. Cutting Blade Precautions 10. Cutting Attachment Guard 14. The Hazard Area CAUTION • To ensure safe operation of this device, become familiar with the safety instructions and the procedure for shutting off the engine. (See [6] Starting and Stopping the Engine.) • In an emergency, it may be necessary to quickly release the machine from your body; therefore, familiarize yourself with the correct use of the harness quick release mechanism. (See [7] Wearing the Harness ●Quickrelease mechanism.) WARNING Never operate the brushcutter without the cutting attachment guard properly installed. (See [5-1] Mounting the cutting attachment guard.) The cutting attachment guard protects the operator from thrown objects and prevents the cutting attachment from contacting the operator. If the cutting attachment is not properly installed, a thrown rock can cause death or severe injury. DANGER • Do not approach the running blade or nylon trimmer with your hand or foot. • If long grass or any other object becomes entangled in the cutting blade or nylon trimmer, shut off the engine and wait for the cutting blade or nylon trimmer to stop completely. • Wear heavy-duty gloves and use caution when handling the stopped blade. The cutting blade is very sharp and can cause death or severe injury. WARNING 11. Fuel Handling Precautions DANGER Fig.2-7 Fig.2-5 • Do not operate the machine near open flame or spilled fuel. • Do not refuel while the engine is running or while the engine is still hot after shutting off the machine. • Do not refuel while smoking. • Thoroughly wipe away any spilled fuel after refueling. • Start the engine at a location at least 3 meters away from the refueling area or the fuel container. Fuel is highly inflammable, and a fire can lead to death or severe injury. 12. Exhaust Gas Precautions DANGER • Do not operate the device within 15 meters of a child, animal, or bystander. Consider a 15-meter radius around the device to be a “hazard area.” • If someone approaches the hazard area, immediately shut off the engine. A running machine can eject debris or gravel at a speed that can cause death or severe injury. 15. Limit your worktime WARNING • Do not operate the machine for more than 2 hours a day. • Rest for 10 to 20 minutes after every 30 to 40 minutes of operation. Continuing to operate the brush cutting without a break can result in excessive fatigue. The resulting loss of attentiveness can lead to an accident or problems with your fingers or hands. If you experience any abnormal symptoms such as pain, discomfort, or paralysis of the fingers or hand, immediately stop operating the machine and seek medical attention. Fig.2-6 Do not run the engine in a room or in any confined area where exhaust emissions can accumulate. Doing so can result in an accumulation of carbon monoxide and other poisonous gases that can cause death or severe poisoning. -3- 554282 - Masport Brushcutter OM - July 2010 7 16. Avoiding Electric Shock ● Mounting the blade cover WARNING Fig.2-8 Fig.2-11 Never touch the spark plug cap or high-voltage wire while the device is running. Doing so can result in a highvoltage electric shock that can cause death or severe injury. 17. Avoiding Burns NOTICE Keep the blade cover on the cutting blade while the brushcutter is not operating. Remove the cover before starting operation. CAUTION Fig.2-9 Never touch the muffler, muffler cover, exhaust pipe, cylinder or cylinder head while the machine is running or immediately after operation, as they become very hot. Doing so can cause burns. 18. Using the Blade Cover CAUTION Fig.2-10 • Before transporting the brushcutter, shut off the engine and mount the blade cover around the cutting blade. Transport it with care. • If transporting the machine in a vehicle, secure it to prevent it from moving around. If the device can move freely during transport, the fuel can spill or the device can be damaged. 8 554282 - Masport Brushcutter OM - July 2010 When mounting the blade cover, position the larger face toward the ground. Adjust the length to suit the size of cutting blade. Secure both ends of the blade cover. -4- 4. Removing obstacles from the work area [3] Ensuring Safe Operation CAUTION To ensure safety, strictly observe the following instructions. Failure to do so can lead to personal injury or severe damage to the machine. 1. Uses of the cutting blade and nylon trimmer Before starting operation, remove any rocks, pieces of rope, metal strips, and other obstacles that can become entangled with rotating parts of the machine from the work area. Mark any hard stationary objects so that the operator can avoid them. 5. Holding the brushcutter Fig.3-1 The brushcutter can be used with either the cutting blade or nylon trimmer. Blade The cutting blade can be used to cut various types of grass. Nylon trimmer The nylon trimmer is suitable for lawn-mowing or brushcutting in locations with obstacles such as trees, fences or walls. NOTICE When operating the brushcutter, install the appropriate cutting attachment guard being used. (See [5-1] Mounting the cutting attachment guard.) 2. Pre-operation inspection Carefully inspect and perform any necessary maintenance before starting the machine. Failure to do so can lead to severe property damage or damage to the machine. a. Tighten or replace loose or lost screws.Confirm that the cutting blade or nylon trimmer has been fully tightened. b. Replace any damaged or worn parts. c. Check for spilled fuel. Check the fuel tank cap and wipe off any spilled fuel. d. Check the cutting blade or nylon trimmer for chipping, cracks, deformation or excessive wear. For more information, see [8] Inspection and maintenance. Fig.3-2 NOTICE See Section [7] Wearing the Harness • Hold the brushcutter on the right side of your body. • Before starting the engine, put on the harness correctly, attach the brushcutter to the harness, and stand in the correct brushcutter holding stance. 6. Starting the engine NOTICE See Section [6] Starting and Stopping the Engine • In some cases the cutting blade or nylon trimmer can suddenly begin rotating when the engine is started. Provide a safe distance around the cutting blade or nylon trimmer before starting the engine. • Make sure that no bystanders are within 15 meters before starting the engine. • Place the machine on flat solid ground before starting the engine. • Make sure the cutting blade or nylon trimmer is not in contact with the ground or any other object. 3. Marking the hazard area A circular area within a radius of 15 meters of the machine is the hazard area. When necessary, mark the area with yellow warning rope and post a warning sign. -5- 554282 - Masport Brushcutter OM - July 2010 9 7. Safety Precautions 10. Cutting pattern MODEL: MT23HM/B Loop handle Fig.3-4 Double handle Fig.3-3 • Hold the machine securely with both hands. Grip the control handle with your right hand; grip the other handle with your left hand. • To maintain a stable posture, adopt a stance wider than shoulder width. • Maintain a firm footing. • Shut off the engine if abnormal noise or vibration occurs, if an emergency occurs, or when putting down the machine. • If someone calls out or otherwise interrupts you while working, always shut off the engine before turning around. When two or more machines are in use simultaneously, it is essential that all operators use extreme care to maintain a safe distance from each other, constantly look around, and always remain aware of presence of the other operators to ensure safe operation. 9. Blade thrust If a running blade hits a hard stationary object such as a tree, rock, or wall, the cutting blade can kick back violently in a phenomenon known as blade thrust. When blade thrust occurs, the reaction can swing the cutting blade violently in an unexpected direction, creating a high risk of injury. To avoid blade thrust, strictly observe the following: • Before starting work, check for hard stationary objects such as trees, rocks, or walls that can cause blade thrust. Mark any hard stationary objects so that the operator can avoid them. • Do not use an excessively dull cutting blade. 554282 - Masport Brushcutter OM - July 2010 MODEL: Other than MT23HM/B Fig.3-5 8. Special precautions when two or more machines are in use 10 • The cutting attachments of the line trimmer rotate clockwise. Cut a 1.5-meter arc from left to right. Within this arc, maintain the cutting device at a consistent height above the ground. Advance slowly and gradually, beginning with the left foot. on the cutting device. If the • Cut brush with the arc arc on the rotating device hits a solid object, a cutting device running at high speed will thrust toward the operator, creating a very dangerous situation. (Fig.3-4) -6- • The cutting attachments of the brushcutter rotate counterclockwise. Cut a 1.5-meter arc from right to left. Within this arc, maintain the cutting blade at a consistent height above the ground. Advance slowly and gradually, beginning with the right foot. on the cutting blade. If the • Cut brush with the arc arc on the rotating blade hits a solid object, a cutting blade running at high speed will thrust toward the operator, creating a very dangerous situation. (Fig.3-5) 11. Abnormal noise and vibration • If the machine suddenly exhibits abnormal noise or vibration, immediately shut off the engine. • Possible causes of sudden noise or vibration include loose screws and damage to the cutting blade or other components. Check the entire machine for any sign of a problem. • After the cause has been found, do not use the machine until you have completed the repair. [4] Fuel and Oil DANGER • Do not handle fuel near open fire (open flame, lit cigarette, stove, etc.) or electrical spark (from electrostatic discharge, welding spark, or switch or battery short-circuit). Doing so can cause the fuel to ignite, resulting in a fire. • Do not refuel while the engine is running or while the engine is still hot after shutting off the machine. Allowing fuel to splash on a hot engine can result in a fire. • Refuel the machine outdoors or in a well-ventilated location. • After refueling, securely close the fuel cap and thoroughly wipe off any spilled fuel. Spilled fuel can ignite after the machine is running, leading to a fire. CAUTION • Do not mix the engine oil and fuel in the fuel tank of the engine. • Fuel-oil mixtures degrade over time. We recommend that you prepare only the amount of the fuel-oil mixture you will use in the short term. Do not use a fuel-oil mixture that was prepared more than a week earlier. A degraded fuel-oil mixture can damage the engine. • Do not use a fuel-oil mixture containing an incorrect proportion of engine oil. Doing so can cause an engine malfunction or engine seizure. Common fuel/oil ratios 50:1 NOTICE Refer to the engine instruction manual for more details. 2% 2-stroke engine Fuel When fueling a 2-stroke engine, use a fuel-oil mixture of gasoline and 2-stroke engine oil. • 2-stroke engine oil required Use high-quality JASO FC class 2-stroke engine oil. 2-stroke engine oil 1 NOTICE Pour the engine oil into a mixing vessel. Add gasoline and mix thoroughly. -7- 554282 - Masport Brushcutter OM - July 2010 80 mL 2 40 1 20 1/2 10 4-stroke engine Models: MT27H & MT 36H Fuel For the 4-stroke engine, use regular lead-free gasoline. Fig.4-1 Fuel 50 4 ltr CAUTION Do not use a fuel-oil mixture prepared by blending oil and gasoline. Doing so can result in hard starting, low power output, and a clogged fuel system. Oil Use 4-stroke gasoline engine oil only. Use 4-stroke oil for gasoline engines rated at API service classification SJ or later (or equivalent). NOTICE • Before starting the engine, check the oil level. Position the engine level with the ground. Confirm that the oil level is to the base of the spout of the fill port. If the level is too low, add oil. • Change the oil if it appears dirty or discolored. (See [8] Inspection and Maintenance 8. Changing the engine oil.) 11 [5] Assembly MODEL: Other than MT23HM/B and MT23HM The standard tightening torques for the bolts, screws, and nuts of the machine are listed below. If a specific tightening torque value for a particular bolt, screw or nut is not provided, apply a standard tightening torque appropriate for the size of that bolt, screw or nut. Size M4 M5 M6 M8 M10 ● With cutting blade mounted A Torque (N･m) 1.6 3.1 5.1 12.2 24.5 C D B CAUTION Do not overtighten, which can lead to broken parts. Fig.5-3 [5-1] Mounting the cutting attachment guard WARNING Never operate the brushcutter without the cutting attachment guard properly installed. The cutting attachment guard protects the operator from thrown objects and prevents the cutting attachment from contacting the operator. If the cutting attachment is not properly installed, a thrown rock can cause death or severe injury. 1. Place the cutting attachment guard (B) and plate (C) against the cutting attachment guard holder (A). Align the holes with their counterparts. (Fig.5-3) 2. Secure these parts by tightening the bolts (D) (M5 × 16). ● With nylon trimmer mounted CAUTION The trimmer piece (F) is very sharp and can cause injury. Wear heavy-duty gloves and handle the trimmer piece (F) very carefully. NOTICE Before using the nylon trimmer, mount the skirt (E) complete with the trimmer piece (F) onto the cutting attachment guard (B). The purpose of the trimmer piece (F) is to cut the nylon cord on the rotating nylon trimmer to the correct length. This ensures the nylon trimmer can rotate smoothly. A MODEL: MT23HM/B C A B Fig.5-1 B to shaft shown(A) (Fig.5-1) 1. Attach Attachthe to guard extend(A) miter of aasguard and to insert a 2. Secure guard by fully tightening screw (B) (M6x45) shaft case.the (Fig.5-1) andSecure nut (C)the (M6). 2. guard by fully tightening screws (B) (M6 × 45) and nuts (C) (M6). C MODEL: MT23HM C D E B G F A Fig.5-2 1. Sandwich the shaft tube between a protector(A) and a protector holder(B). (Fig.5-2) 2. Secure these parts by tightening the bolts (C) (M5 × 10). 12 554282 - Masport Brushcutter OM - July 2010 -8- Fig.5-4 1. Place the cutting attachment guard (B) and plate (C) against the cutting attachment guard holder (A). Align the holes with their counterparts. 2. Secure these parts by tightening the bolts (D) (M5 × 16). 3. Mount the trimmer piece (F) onto the skirt (E) with the self-tapping screws (G) (#4 × 12). [Tightening torque] 0.75 (N･m) 4. Firmly fit the skirt (E) into the slot in the cutting attachment guard (B). ● Mounting the cutting blade A G A-1 A-2 B B-1 NOTICE The slots provided in the trimmer piece (F) allow you to finely adjust the height of the trimmer piece to the height of the nylon cord. To remove the skirt (E), insert a screwdriver into each of the three slots in the cutting attachment guard (B), and prize the skirt (E) out of the slot. [5-2] Mounting the cutting blade or nylon trimmer C D E F Fig.5-5 B C D F E Fig.5-6 NOTICE Other than MODEL: MT23HM/B • The cutting blade and nylon trimmer rotate counterclockwise as viewed from the angle transmission (A) side. (Fig.5-5) • The clamping nut (F) of the angle transmission (A) is a left-hand thread. (Tighten counterclockwise as viewed from the clamping nut (F) side.) ● Locking the output shaft (A-2) When loosening or tightening the clamping nut (F), lock the output shaft (A-2) as described below. 1. Turn the blade retainer (B) until the hole (B-1) is aligned with the hole (A-1) on the angle transmission. 2. Lock the blade retainer (B) by inserting the hex key wrench (G) through the hole (A-1) in the angle transmission and into the hole (B-1) in the blade retainer. Fig.5-7 CAUTION The cutting blade is very sharp and can cause injury. Wear heavy-duty gloves when handling and mounting the blade. NOTICE • Mount the cutting blade with the printed side against the angle transmission (A) side. • Correctly fit the hole in the center of the blade (C) onto the protrusion on the blade retainer (B). If misaligned, the blade (C) can work loose and generate abnormal noise or vibration while in use. 1. Lock the output shaft (A-2). Turn the clamping nut (F) clockwise and remove. 2. Mount the blade retainer (B), blade (C), blade retainer (D), stabilizer (E) and clamping nut (F), in order, onto the angle transmission (A). Confirm the correct orientation. (Fig.5-6) 3. While locking the output shaft (A-2), turn the clamping nut (F) counterclockwise until fully tightened. (Fig.5-7) The sizes of the clamping nuts (F) are as follows: MT36H, MT36K: M10 Others: M8 -9- 554282 - Masport Brushcutter OM - July 2010 13 MODEL: Other than MT23HM/B and MT23HM ● Mounting the nylon trimmer MODEL: MT23HM/B A B A-2 A-2 G H D B H-1 G E F Fig.5-8 1. Lock the output shaft (A-2). Turn the nylon trimmer (H) clockwise until fully tightened. (Fig.5-8) H-2 Fig.5-10 MODEL: MT23HM NOTICE • For the removal/setup method for the housing (H-1) of the nylon trimmer, refer to the instruction manual for the nylon trimmer. • Do not use the blade retainer (D) and the stabilizer (E). G A B H-1 1. Lock the output shaft (A-2). Turn the clamping nut (F) clockwise and remove. 2. Referring to the instruction manual for the nylon trimmer, disassemble the nylon trimmer, separating the housing (H-1) and the cord cassette (H-2). 3. Align the center hole of the housing (H-1) with the protrusion on the blade retainer (B). 4. While locking the output shaft (A-2), turn the clamping nut (F) counterclockwise until fully tightened. 5. Set the cord cassette (H-2) on the housing (H-1). (Fig.5-10) A-2 E F H-2 Fig.5-9 NOTICE • For the removal/setup method for the housing (H-1) of the nylon trimmer, refer to the instruction manual for the nylon trimmer. • Do not use the stabilizer (E). 1. Lock the output shaft (A-2). Turn the clamping nut (F) clockwise and remove. 2. Referring to the instruction manual for the nylon trimmer, disassemble the nylon trimmer, separating the housing (H-1) and the cord cassette (H-2). 3. Align the center hole of the housing (H-1) with the protrusion on the blade retainer (B). 4. While locking the output shaft (A-2), turn the clamping nut (F) counterclockwise until fully tightened. 5. Set the cord cassette (H-2) on the housing (H-1). (Fig.5-9) 14 554282 - Masport Brushcutter OM - July 2010 - 10 - [5-3] Attaching the handle, throttle linkage, and cord NOTICE Attach the loop handle on the angle transmission side relative to the position marker (F). ● Attaching the handle 1. Loop handle 1. Using the position marker (F) on the shaft tube as a guide, sandwich the shaft tube between the loop handle body (A) and the handle holder (B). While doing so, make sure handle holder (B) is oriented as indicated by the arrow direction in the illustration. This arrangement is intended to protect the operator from accidental contact with the cutting attachment. (Fig.5-13) 2. Secure the loop handle by fully tightening screws (C) (M5 × 30) and nuts (D) (M5). [Tightening torque] 1.5 (N･m) MODEL: MT23HM/B C A B D 2. Double handle Fig.5-11 MODEL: MT36K, MT36H 1. Sandwich the shaft tube between the loop handle body (A) and the handle holder (B). (Fig.5-11) 2. Secure the loop handle by fully tightening screws (C) (M5 × 35) and nuts (D) (M5). [Tightening torque] 1.5 (N･m) MODEL: MT23HM F O E-1 E-2 A B Fig.5-12 1. Open facesofofa the handle Attachthe to clamping extend miter handle (A)(A) andand to insert a the shaft tube (Fig. 5-12). pipe. (Fig.5-12) 2. Secure the loop handle by fully tightening screws (B) (M5 × 30) and nuts (C) (M5). [Tightening torque] 1.5 (N･m) MODEL: MT27M, MT27K, MT27H C K G J B C A A I H N D M C L Fig.5-14 1. Slide the control handle (A) over handle (B). Secure by tightening screw (J) (M5 × 30) and nut (K) (M5). [Tightening torque] 1.5 (N･m) 2. Slide the handgrip (C) over handle (D). Secure by tightening screw (L) (M5 × 30) and nut (M) (M5). [Tightening torque] 1.5 (N･m) 3. Bring the inner end of handle (B) into contact with that of handle (D). Fit both ends into the slot on the handle holder (E-2). 4. Install the handle holder (E-1) and hand-tighten bolt (N) (M6 × 20). 5. Mount handle holder (E-2) to handle holder (F). Handtighten bolt (O) (M8 × 50). 6. Bring the inner ends of both handles into firm contact in the middle of handle holder (E-1). Adjust the handle angle. 7. Secure the handles by evenly tightening bolts (N) (M6 × 20) and (O) (M8 × 50). 8. Using clips (G) and (H), fix the throttle linkage and cord assembly (I) to handle (B) and the shaft tube. F B D E Fig.5-13 - 11 - 554282 - Masport Brushcutter OM - July 2010 15 ●Attaching the throttle linkage and cord [6] Starting and Stopping the Engine MODEL: Other than MT36K and MT36H The throttle linkage a code is already Re-assemble the air and cleaner cover (A). equipped. MODEL: MT36K, MT36H MT36H C D DANGER • Start up the engine only when no open flame is located near the machine. • Start the engine at a location at least 3 meters away from the refueling area or the fuel container. Fuel is highly inflammable, and a fire can lead to death or severe injury. F G A B E I J H E WARNING • In some cases the cutting blade or nylon trimmer can suddenly begin rotating when the engine is started. Provide a safe distance around the cutting blade or nylon trimmer before starting the engine. • Make sure that no bystanders are within 15 meters before starting the engine. • Place the machine on flat solid ground before starting the engine. • Make sure the cutting blade or nylon trimmer is not in contact with the ground or any other object. F C D MT36K G A J NOTICE Refer to the engine instruction manual for more details. B MODEL: MT23HM/B, MT23HM Fig.5-15 A F MT36K MT36H B E 1～2 mm Fig.5-16 C NOTICE Refer to the engine instruction manual for more details. 1. Referring to the engine instruction manual, remove the air cleaner cover (A). 2. Loosen the lock nut (C) on the throttle linkage (B). 3. Fit the leading end (E) of the throttle linkage into the slot of the leading end mount (F) of the carburetor. Check for the correct orientation of the leading end mount (F). (Fig.5-16) 4. Fit the throttle linkage into the stay (G), adjust the play at the leading end of throttle linkage (E) with adjustment nut (D), and secure the adjustment with the lock nut (C). NOTICE Make sure that the play at the leading end of throttle linkage (E) is within the range of 1 to 2 mm. (Fig.5-16) 5. Using the screw & washer assembly (I) (M5 × 10), connect the engine cord (H) to the engine (MT36H only). 6. Connect the cord (J) from the control handle to the engine cord. air cleaner 7. Re-assemble Mount the airthe cleaner cover cover (A). (A). 16 554282 - Masport Brushcutter OM - July 2010 - 12 - Fig.6-1 Fig.6-2 Fig.6-3 Fig.6-4 MODEL: MT27M, MT27K, MT27H ● Starting the engine NOTICE To prevent the throttle trigger (C) from being accidentally actuated and starting the cutting blade, a throttle trigger lockout (B) is provided on the throttle trigger (C). The throttle trigger (C) can be actuated only when the throttle trigger lockout (B) is pushed downward. START A B E F H D I G Fig.6-6 Fig.6-5 1. Set the stop switch (A) to the middle position. (Fig.6-3) 2. Fully squeeze both the throttle trigger lockout (B) and the throttle trigger (C) at the same time. (Fig.6-1) 3. Set the stop switch (A) to the START position (Fig 6-2), release both the throttle trigger lockout (B) and throttle trigger (C). The throttle will be locked in the middle opening position (“starting throttle lock”), which enables you to start the engine easily. 4. Repeatedly push the primer (D) until fuel starts to flow inside the clear fuel return tube (G). (Fig.6-5) NOTICE If the primer (D) is pushed too many times, any excess fuel will return to the fuel tank. Push the primer a sufficient number of times to prime the engine. The engine will fail to start if priming is insufficient. 5. When the engine is cold, set the choke lever (E) to the START position. When the engine is warm, there is no need to actuate the choke lever (E). (Fig.6-5) 6. Hold the machine steady and pull hard on the recoil starter (F) to start the engine. It may be necessary to pull on the starter repeatedly. 7. If you have set the choke lever (E) to the START position in step 5 above, return the lever to its original position. 8. Squeeze throttle trigger (C) again and release quickly. This releases the starting throttle lock and causes the engine to idle. 9. When the engine is cold, allow it to idle for about three minutes to warm it up. ● Shutting off the engine 1. Release the throttle trigger (C). 2. Slide the stop switch (A) to the STOP position. (Fig.64) WARNING Even after the engine has been shut off, the rotating section (cutting blade or nylon trimmer) will continue to rotate for a while. Hold the brushcutter steady until all moving parts have stopped completely. The cutting blade is very sharp, and can cause death or severe injury. - 13 - 554282 - Masport Brushcutter OM - July 2010 C Fig.6-7 Fig.6-8 ● Starting the engine NOTICE To prevent the throttle trigger (C) from being accidentally actuated and starting the cutting blade, a throttle trigger lockout (B) is provided on the throttle trigger (C). The throttle trigger (C) can be actuated only when the throttle trigger lockout (B) is pushed downward. MT27M, MT27H MT27H ONLY • MODEL: MT27M, 1. Set the stop switch (A) to the START position.(Fig.6-7) 2. Fully squeeze both the throttle trigger lockout (B) and the throttle trigger (C) at the same time. (Fig.6-6) 3. While pressing knob (I), release both the throttle trigger lockout (B) and throttle trigger (C). The throttle will be locked in the middle opening position (“starting throttle lock”), which enables you to start the engine easily. 4. Repeatedly push the primer (D) until fuel starts to flow inside the clear fuel return tube (G). (Fig.6-5) NOTICE If the primer (D) is pushed too many times, any excess fuel will return to the fuel tank. Push the primer a sufficient number of times to prime the engine. The engine will fail to start if priming is insufficient. 5. When the engine is cold, set the choke lever (E) to the START position. When the engine is warm, there is no need to actuate the choke lever (E). (Fig.6-5) 6. Hold the machine steady and pull hard on the recoil starter (F) to start the engine. It may be necessary to pull on the starter repeatedly. 17 7. If you have set the choke lever (E) to the START position in step 5 above, return the lever to its original position. 8. Squeeze throttle trigger (C) again and release quickly. This releases the starting throttle lock and causes the engine to idle. 9. When the engine is cold, allow it to idle for about three minutes to warm it up. • MODEL: MT27K ONLY START J K 1. Release the throttle trigger (C). 2. Slide the stop switch (A) to the STOP position. (Fig.68) WARNING Even after the engine has been shut off, the rotating section (cutting blade or nylon trimmer) will continue to rotate for a while. Hold the brushcutter steady until all moving parts have stopped completely. The cutting blade is very sharp, and can cause death or severe injury. ● Adjusting engine speed L M ● Shutting off the engine Knob (H) on the control handle is a throttle limiter. (Fig.6-6) Turn knob (H) clockwise to reduce the engine speed reached when the throttle trigger (C) is squeezed. Turn knob (H) counterclockwise to increase the engine speed reached when the throttle trigger (C) is squeezed. Adjust the position of knob (H) to match the work conditions. Fig.6-9 NOTICE Unlike the other MT27Kisstarting other MODELS, MODEL, MT27K startingthrottle throttle lock cannot be manipulated. manipulated. MODEL: MT36K, MT36H N NOTICE Move the choke lever (K) to the START position and squeeze the throttle trigger (C). The choke lever (K) will automatically return to the original position. 1. Set the stop switch (A) to the START position. (Fig.67) 2. Repeatedly push the primer (J) until fuel starts to flow inside the clear fuel return tube (M). (Fig.6-9) NOTICE If the primer (J) is pushed too many times, any excess fuel will return to the fuel tank. Push the primer (J) a sufficient number of times to prime the engine. The engine will fail to start if priming is insufficient. 3. When the engine is cold, set the choke lever (K) to the START position. When the engine is warm, there is no need to actuate the choke lever (K). (Fig.6-9) 4. Hold the machine steady and pull hard on the recoil starter (L) to start the engine. It may be necessary to pull on the starter repeatedly. (Fig.6-9) 5. If you have set the choke lever (K) to the START position in step 3 above, squeeze the throttle trigger (C) quickly to release the choke. 6. When the engine is cold, allow it to idle for about three minutes to warm it up. P O Fig.6-10 Fig.6-11 Fig.6-12 Fig.6-13 18 554282 - Masport Brushcutter OM - July 2010 - 14 - ● Starting the engine NOTICE To prevent the throttle trigger (O) from being accidentally actuated and starting the cutting blade, a throttle trigger lockout (P) is provided on the throttle trigger (O). The throttle trigger (O) can be actuated only when the throttle trigger lockout (P) is pushed downward. MT36H ONLY • MODEL: MT36H 1. Fully squeeze both the throttle trigger lockout (P) and the throttle trigger (O) at the same time. (Fig.6-10) 2. While sliding stop switch (N) to START, release both the throttle trigger lockout (P) and the throttle trigger (O) (Fig.6-11). The throttle will be locked in the middle opening position (“starting throttle lock”), which enables you to start the engine easily. 3. Repeatedly push the primer until fuel starts to flow inside the clear fuel return tube. NOTICE If the primer is pushed too many times, any excess fuel will return to the fuel tank. Push the primer a sufficient number of times to prime the engine. The engine will fail to start if priming is insufficient. 4. When the engine is cold, set the choke lever to the START position. When the engine is warm, there is no need to actuate the choke lever. 5. Hold the machine steady and pull hard on the recoil starter to start the engine. It may be necessary to pull on the starter repeatedly. 6. If you have set the choke lever to the START position in step 4 above, return the lever to its original position. 7. Squeeze throttle trigger (O) again and release quickly. This releases the starting throttle lock and causes the engine to idle. (Fig.6-12) 8. When the engine is cold, allow it to idle for about three minutes to warm it up. 5. If you have set the choke lever (K) to the START position in step 3 above, squeeze the throttle trigger (O) quickly to release the choke. 6. When the engine is cold, allow it to idle for about three minutes to warm it up. ● Shutting off the engine 1. Release the throttle trigger (O). 2. Slide the stop switch (N) to the STOP position.(Fig.613) WARNING Even after the engine has been shut off, the rotating section (cutting blade or nylon trimmer) will continue to rotate for a while. Hold the brushcutter steady until all moving parts have stopped completely. The cutting blade is very sharp, and can cause death or severe injury. ● Adjusting engine speed Q Fig.6-14 • MODEL: MT36K ONLY NOTICE Unlike the MT36H, MT36K is starting throttle lock cannot be manipulated. Knob (Q) on the control handle is a throttle limiter. Turn knob (Q) clockwise to reduce the engine speed reached when the throttle trigger (O) is squeezed. Turn knob (Q) counterclockwise to increase the engine speed reached when the throttle trigger (O) is squeezed. Adjust the position of knob (Q) to match the work conditions. NOTICE Move the choke lever (K) to the START position and squeeze the throttle trigger (O). The choke lever (K) will automatically return to the original position. (Fig.6-9) NOTICE If knob (Q) is overtightened (in the clockwise direction), it will be impossible to keep stop switch (N) in the START position. 1. Push the stop switch (N) to the START position. (Fig.6-9) 2. Repeatedly push the primer (J) until fuel starts to flow inside the clear fuel return tube (M). (Fig.6-9) NOTICE If the primer (J) is pushed too many times, any excess fuel will return to the fuel tank. Push the primer (J) a sufficient number of times to prime the engine. The engine will fail to start if priming is insufficient. 3. When the engine is cold, set the choke lever (K) to the START position. When the engine is warm, there is no need to actuate the choke lever (K). (Fig.6-9) 4. Hold the machine steady and pull hard on the recoil starter (L) to start the engine. It may be necessary to pull on the starter repeatedly. (Fig.6-9) - 15 - 554282 - Masport Brushcutter OM - July 2010 19 [7] Wearing the Harness NOTICE The harness has a quick-release mechanism that allows you to immediately release the machine from the harness in an emergency. D F ● Attaching the side hook C Fig.7-3 A 2.Before starting to work, attach the side hook (D) to the suspension point (F) on the shaft tube. (Fig.7-3) D B ● Recommended working position Fig.7-1 NOTICE If side hook (D) has disengaged from hook (B), engage it. 1. Insert hook (B) into side hook (D). 2. While holding hook (B) and side hook (D) in place, insert stopper (C) into the hole on hook (B). (Fig.7-1) ● Adjusting the harness A E About 200 mm Fig.7-4 CAUTION If releasing both hands from the handle, use extreme care. Suddenly releasing the handle can cause the cutting blade or nylon trimmer to kick, possibly resulting in injury. • Before starting the engine, put on the harness correctly, attach the brushcutter to the harness, and stand in the correct brushcutter holding stance. • Ensure the cutting blade is 100 mm to 300 mm above the ground before releasing both hands from the handle. • Ensure the nylon trimmer is 0 mm to 300 mm above the ground before releasing both hands from the handle. (Fig.7-4) • See “Adjusting the holding position” for details. A NOTICE After installing a new cutting attachment, confirm the correct holding position and make any necessary adjustments. E ● Adjusting the holding position Fig.7-2 1.As shown in the diagram, adjust the harness (A) so that hip pad (E) is against your right hip. (Fig.7-2) 20 554282 - Masport Brushcutter OM - July 2010 - 16 - • To adjust the holding position, simply change the length of the harness belt and the location of the suspension point. • Use the following procedure to adjust the suspension point. MODEL: MT23HM/B, MT23HM, MT27M, MT27K, MT27H G F Fig.7-5 CAUTION • To find the optimal brushcutter holding position, change the location of the suspension point gradually (in increments of 5 to 10 mm). Moving the suspension point too far in one step can cause you to lose your balance when checking the new brushcutter holding position, possibly leading to tripping and injury. • Always fully tighten the screw & washer assembly (G) (M6 × 12) before checking the brushcutter holding position. Otherwise, the brushcutter can change position suddenly while you are checking the brushcutter holding position, causing you to lose balance and possibly leading to tripping and injury. 1. Loosen the screw & washer assembly (G) (M6 × 12). 2. Adjust the location of suspension point (F). 3. Fully tighten the screw & washer assembly (G) (M6 × 12). ● Quick-release mechanism WARNING • In an emergency, release the throttle trigger and shut off the engine. Support the machine with your left hand and operate the quick-release mechanism. Be aware that the machine will fall and that a rotating blade or nylon trimmer can cause death or severe injury. • Be careful not to accidentally operate the red belt (I) on the harness. Be aware that the machine will fall and that a rotating blade or nylon trimmer can cause death or severe injury. I Fig.7-7 In an emergency, pull upward on the red belt (I) on the harness. This quickly releases the machine from the harness. NOTICE Before using the machine, check that the quick release mechanism is functioning. MODEL: MT36K, MT36H D H Fig.7-6 CAUTION When checking the brushcutter holding position, shift the position one hole at a time at the suspension point to which the side hook is installed. Shifting the location of the suspension point too much in one step can cause you to lose balance when checking the new brushcutter holding position, possibly leading to tripping and injury. When installing the side hook (D), select the most appropriate hole from the six suspension point holes (H). - 17 - 554282 - Masport Brushcutter OM - July 2010 21 [8] Inspection and Maintenance WARNING • Never inspect or perform maintenance on the machine when the engine is running. The cutting blade is very sharp, and can cause death or severe injury. • Inspect or perform maintenance on the machine only when the engine is cold. Otherwise, burns and other injuries can result. Carefully inspect and perform any necessary maintenance before starting the machine. Failure to do so can lead to severe property damage or damage to the machine. a. Tighten or replace loose or lost screws. b. Replace any damaged or worn parts. c. Check for spilled fuel. Check the fuel tank cap and wipe off any spilled fuel. NOTICE Refer to the engine instruction manual for more details. 2. Inspecting, adjusting, and replacing the spark plug If the electrodes are fouled or the spark plug gap is incorrect, the spark will not be reliable and the engine will not run smoothly. ＜ Inspection-adjustment timing ＞ Every 50 hours of operation ＜Replacement frequency＞Every 100 hours of operation WARNING Do not touch a hot spark plug immediately after the engine has been shut off. Doing so can cause burns. D 0.6～0.7mm E Fig.8-2 1. Cleaning the air cleaner A clogged air cleaner will result in a lack of power and increased fuel consumption. ＜Inspection timing＞Before and after operation ＜Cleaning frequency＞Every 20 hours of operation CAUTION Do not run the engine with the air cleaner cover removed. Doing so will result in premature engine wear. C 1. Remove the spark plug (D) from the engine and check the electrodes. 2. Clean the fouled electrodes with a wire brush (E) or similar tool. 3. Adjust the spark plug gap to 0.6 to 0.7 mm. 4. Securely thread the spark plug (D) into the engine. [Tightening torque] 14 (N･m) NOTICE To install the spark plug (D), first finger-tighten the spark plug. Fully tighten with the wrench provided. 5. Fully push the spark plug cap onto the spark plug. NOTICE The following are the causes of heavily fouled spark plugs: • an excessively high proportion of engine oil in the fueloil mixture; • low-quality engine oil, or • a fouled air cleaner. B A 3. Inspecting and cleaning the engine cooling fins Fig.8-1 1. Referring to the engine instruction manual, remove the air cleaner cover (A). 2. Wash the element (B) in neutral detergent diluted with water. Rinse, firmly squeeze out excess moisture, and allow to dry. 3. Immerse in engine oil and firmly squeeze out excess oil. 4. Adjust the element (B) to the contour of the air cleaner case (C) and fit it in the air cleaner case (C). 5. Mount the air cleaner cover (A). If the engine cooling fins become clogged with grass clippings or other debris, the engine can overheat and seize up. ＜ Inspection & cleaning frequency ＞ Before and after operation F Fig.8-3 22 554282 - Masport Brushcutter OM - July 2010 - 18 - 1. Check the engine cooling fins (F) for excess grass clippings, mud and the like. 2. If the cooling fins are plugged with such debris, clean them. 4. Inspection and cleaning of the muffler and exhaust port An accumulation of carbon on the muffler and exhaust port will cause a decrease in engine output. ＜Inspection and cleaning frequency＞Every 50 hours of operation • The muffler removal method and detailed cleaning procedure is detailed in your engine instruction manual. If you require more information, contact your dealer for technical assistance. 6. Cleaning the fuel filter and fuel tank A clogged fuel filter can cause engine malfunctions. Accumulated water or dirt in the fuel tank can also cause engine malfunctions. ＜Cleaning frequency＞Every 50 hours of operation WARNING Do not clean the fuel filter or fuel tank near open flame. Cleaning oil can easily ignite and cause a fire. I K J 5. Inspecting the clutch shoe ＜Inspection timing＞Before and after operation H L G 1. Using a piece of wire (I) or the like, draw out the fuel filter (J) through the fill port (K) on the fuel tank. 2. If the fuel filter (J) is dirty, clean it in cleaning oil (lowsulfur kerosene). If the fuel filter (J) is heavily fouled, replace it. 3. If the interior of the fuel tank (L) is dirty, rinse with cleaning oil and eject the dirt. Dispose of any used cleaning oil according to local laws and regulations. 4. Install the fuel filter (J) in the fuel tank (L). Fig.8-4 1. Disconnect the throttle linkage and cord from the engine. (Follow the procedure in [5-4] Attaching the handle, throttle linkage and cord in reverse order.) 2. Remove the clutch case from the engine. (Follow the procedure in [5-3] Mounting the engine in reverse order.) 3. Visually inspect the lining (H) of the clutch shoe (G). 4. If the lining (H) is worn, replace the clutch shoe (G). NOTICE Clutch shoe (G) replacement requires an appropriate tool kit and special maintenance techniques. We recommend that you ask your dealer to replace the clutch. 5. After the inspection, mount the engine to the clutch case and attach the throttle linkage and cord to the engine. For details, see [5-3] Mounting the engine and [5-4] Attaching the handle, throttle linkage and cord. Fig.8-5 NOTICE Properly dispose of waste cleaning oil. 7. Inspecting and adjusting the carburetor setting Ensure that the cutting blade or nylon trimmer does not rotate while the engine is idling. If it does, adjust the idle speed. ＜Inspection timing＞Before operation M Fig.8-6 Idle-speed adjuster (M) • Clockwise: Increases idle speed. • Counterclockwise: Decreases idle speed. Recommended idle speed: 2800 min-1 - 19 - 554282 - Masport Brushcutter OM - July 2010 23 8. Changing the engine oil (GX Series only) Dirty engine oil can severely shorten engine life. ＜Oil change frequency＞ 1st change: after initial 10 hours of operation 2nd and subsequent changes: after every 50 hours of operation 10. Replenishing grease for the angle transmission Insufficient grease in the angle transmission will lead to premature wear of the bearing and gears. ＜ Replenishment frequency ＞ Every 50 hours of operation N O Q Fig.8-7 R 1. Remove the oil refill port cap (N) and drain the old engine oil. 2. Level the oil tank. Pour fresh oil into the spout (O). 3. After refilling, firmly tighten the oil refill port cap (N). NOTICE • Engine oil will deteriorate even if the machine remains inoperative. Change the engine oil every six months. • Refer to the engine instruction manual for more details. 9. Inspecting the cutting blade When the cutting edge becomes dull, the cutting blade will fail to cut cleanly and can exhibit blade thrust during operation. Using a broken, cracked or deformed blade carries a risk of blade fragments flying off during operation. ＜Inspection timing＞Before and after operation P Fig.8-8 1. Check that the cutting blade (P) has been correctly installed and that the blade clamping nut is not loose. (See [5-2] Mounting the cutting blade or nylon trimmer.) 2. Check the cutting blade (P) for excessive wear, breakage, cracks or deformation. If any such problems are found, replace the blade with a new one. Never use a damaged blade. 24 554282 - Masport Brushcutter OM - July 2010 - 20 - Fig.8-9 1. Remove bolt (Q) (M6 × 8) from the side face of the angle transmission. 2. Inject grease into the hole (R) until the grease overflows. 3. Wipe away the excess grease. 4. Reinstall bolt (Q) (M6 × 8) [Tightening torque] 3.6 (N･m) Inspection & Maintenance Checklist Before and after operation Checkpoints Loose screws, nuts and bolts Fuel leaks Air cleaner Spark plug Engine Engine cooling fins Muffler/exhaust port Inspect ○ Inspect Inspect Clean Inspect and adjust Replace ○ ○ Inspect and clean Every 20 hours of operation Every 50 hours of operation Every 100 hours of operation ○*1 ○ ○ ○ Inspect and clean Inspect Clean Clean Inspect Inspect Replace ○ ○*2 Clutch shoe ○ Fuel filter ○ Fuel tank ○ Carburetor ○ Engine oil (GX Series only) ○*3 Loose screws, nuts and ○ Inspect bolts Broken, worn or missing ○ Inspect parts Breakage, wear, cracks or Entire deformation of the unit ○ Inspect cutting blade or nylon trimmer; loose clamping nuts Grease in angle Replenish ○ transmission grease ∗1 When using the machine in a dusty location, clean the air cleaner after every 10 hours of operation. ∗2 Clutch shoe replacement requires an appropriate tool kit and special maintenance techniques. We recommend that you ask your dealer to replace the clutch. ∗3 Change the oil after the first 10 hours of operation. Because the engine oil will deteriorate even when the machine is not in use, change the engine oil every six months. The maintenance or repair work by the user is limited to those activities as described in this instruction manual. All other work is to be done by Authorised Service Agents. Use only genuine spare parts and accessories. Use of non-approved accessories and tools means increased risk of accidents and injuries. Masport will not accept any liability for accidents or damage caused by the use of any non-approved attachment or accessories. - 21 - 554282 - Masport Brushcutter OM - July 2010 25 [9] Long-term Storage If the machine will not be started for 30 days or longer, maintain and store the machine as follows: 1. Remove debris from the machine. Check the machine for damage and loose screws. Correct any problems so that the machine can be restarted later without a problem. 2. Drain the fuel from the fuel tank. Start the engine and run it until no fuel remains in the carburetor. (The engine will stop automatically when no fuel remains.) 3. Allow the engine to cool. Remove the spark plug and squirt a small amount of fresh engine oil into the spark plug hole. Slowly pull the recoil starter cord two or three times. 4. Reinstall the spark plug. Slowly pull the recoil starter cord and release it when you feel resistance. (This closes the intake and exhaust ports.) 5. Lightly wipe the external surface of the engine with cloth. Then, store the machine in a dry dust-free location where no open fire is present. 6. Before storing the machine, clean the cutting blade and check for any irregularities. Install the blade cover provided as a standard accessory. 7. Store the drained fuel in a safe container and keep it in a cool, dry room. NOTICE Refer to the engine instruction manual for more details. CAUTION Do not store the machine for a prolonged period with fuel remaining in the fuel tank. Impurities in the fuel will deteriorate, adversely affecting the carburetor and fuel filter and possibly causing an engine malfunction. Always fully drain the fuel before storing the machine. 26 554282 - Masport Brushcutter OM - July 2010 - 22 - [10] Troubleshooting This troubleshooting section describes possible causes and remedies for problems you might encounter during operation of the machine. If a problem persists after you have attempted the solutions recommended in this section, contact your dealer for technical assistance. Do not attempt to disassemble the machine. ● Engine does not start. Typical cause • The stop switch is in the STOP position. • The fuel has deteriorated or is of poor quality. • The carburetor is flooded with excess fuel. Solution • Set the stop switch to the START position. • Use fresh fuel of the correct grade. • Turn the choke lever to the position opposite the START position. Pull the recoil starter cord repeatedly. • Using a screwdriver or other appropriate tool, remove the deposited carbon from the muffler. • Clean the electrodes or replace the spark plug. • The muffler exhaust pipe opening is blocked. • The spark plug electrodes are fouled. ● Engine does not accelerate. Typical cause • The fuel has deteriorated or is of poor quality. • The muffler exhaust pipe opening is blocked. Solution • Use fresh fuel of the correct grade. • Using a screwdriver or other appropriate tool, remove the deposited carbon from the muffler. ● Engine stalls when the throttle trigger is released. Typical cause The idle speed is too low. Solution Adjust the idle speed with the idle-speed adjuster on the carburetor. ● Cutting blade continues to rotate after the throttle trigger is released. Typical cause • The idle speed is too high. Solution • Adjust the idle speed with the idle-speed adjuster on the carburetor. • Adjust the play on the throttle linkage. • The throttle linkage has little or no play. ● Engine speed fluctuates. Typical cause The fuel filter is clogged. Solution Clean or replace the fuel filter. ● Abnormal noise or vibration occurs. Typical cause • Blade or nylon trimmer is improperly installed. • Cutting attachment guard or handle is improperly installed. • Clamping screws are loose. ● Fuel consumption is high. Typical cause • The air cleaner is clogged. • The cutting blade has poor cutting performance. Solution • Check the cutting blade or nylon trimmer and reinstall if necessary. • Check the cutting attachment guard or handle and reinstall if necessary. • Check the clamping screws and retighten if necessary. Solution • Clean the air cleaner. • Replace the cutting blade. NOTICE Refer to the engine instruction manual for more details. - 23 - 554282 - Masport Brushcutter OM - July 2010 27 Head Office - New Zealand 1-37 Mt Wellington Highway, Panmure, Auckland 1060 P.O. Box 14 349, Panmure, Auckland 1741 554282 - Masport Brushcutter OM - July 2010